CN108663700B - GPS signal loss processing system and method - Google Patents
GPS signal loss processing system and method Download PDFInfo
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- CN108663700B CN108663700B CN201810913575.0A CN201810913575A CN108663700B CN 108663700 B CN108663700 B CN 108663700B CN 201810913575 A CN201810913575 A CN 201810913575A CN 108663700 B CN108663700 B CN 108663700B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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Abstract
The invention provides a GPS signal loss processing system and method for a vehicle. The GPS signal loss processing system comprises: the road condition acquisition device is used for acquiring road condition information of the vehicle; the judging module is used for judging whether the vehicle is in a GPS signal loss-prone area according to the road condition information, outputting a first judging result, further judging whether the GPS signal of the vehicle is lost when the first judging result is negative, and outputting a second judging result; and the processor is used for selecting a first processing mode to perform signal recovery processing on the GPS signal when the first judgment result is yes and selecting a second processing mode to perform signal recovery processing on the GPS signal when the second judgment result is yes. The scheme of the invention saves signal communication times on one hand and saves signal storage space on the other hand, thereby reducing storage pressure, and the system has simple structure and simple and convenient method flow.
Description
Technical Field
The invention relates to the technical field of automobile navigation, in particular to a GPS signal loss processing system and a GPS signal loss processing method.
Background
A system for positioning and navigating in real time in the global range by using a GPS positioning satellite is called a global satellite positioning system, which is called GPS for short. The GPS is a satellite navigation system which is developed and established by the American national defense department and has all-round, all-weather, all-time and high-precision, can provide navigation information such as low-cost and high-precision three-dimensional position, speed, precise timing and the like for global users, is an application model of a satellite communication technology in the navigation field, greatly improves the informatization level of the global society, and powerfully promotes the development of digital economy. At present, GPS is widely applied to the application fields of mobile terminals, automobiles and the like.
"satellite loss" means that the GPS signal is lost, resulting in inability to locate or inaccurate location. For example, when an automobile enters a tunnel or other places where there is substantially no signal, a GPS signal cannot be acquired in time or the GPS signal is disturbed, which causes deviation of the track of the GPS on the map, and even when the automobile leaves the tunnel, the navigation map cannot be updated accurately in time due to superposition of the previously disturbed GPS signal.
Disclosure of Invention
An object of the first aspect of the present invention is to solve the technical problem existing in the prior art that GPS signals are easily lost in a specific area.
A further object of the first aspect of the invention is how GPS signals can be processed after a loss of a particular segment to reduce the number of communications and to relieve data storage pressure.
It is an object of the second aspect of the invention to provide a simple method of recovering lost GPS signals.
The present invention provides a GPS signal loss processing system for a vehicle, including:
The road condition acquisition device is used for acquiring road condition information of the vehicle;
The judging module is used for judging whether the vehicle is in a GPS signal loss-prone area according to the road condition information, outputting a first judging result, further judging whether the GPS signal of the vehicle is lost when the first judging result is negative, and outputting a second judging result; and
And the processor is used for selecting a first processing mode to perform signal recovery processing on the GPS signal when the first judgment result is yes and selecting a second processing mode to perform signal recovery processing on the GPS signal when the second judgment result is yes.
Optionally, the processor is configured to, in the first processing mode, disconnect the search request for the GPS signal of the vehicle until the vehicle is about to exit the area where the GPS signal is easily lost, send the search request, and clear a previous GPS signal.
Optionally, when the vehicle-mounted navigation device of the vehicle or the navigation device of the mobile terminal is in an on state, the road condition obtaining device selects the vehicle-mounted navigation device or the navigation device of the mobile terminal.
Optionally, the processor is configured to determine, according to the vehicle speed information of the vehicle and the road condition information acquired by the vehicle-mounted navigation device or the navigation device, a time when the vehicle exits from the area where the GPS signal is easily lost, and send the search request in advance.
Optionally, when the vehicle-mounted navigation device of the vehicle or the navigation device of the mobile terminal is in an off state, the road condition obtaining device is selected as an image obtaining device for obtaining an environment image.
Optionally, the processor is configured to determine whether to exit the area prone to GPS signal loss according to the environment image acquired by the image acquisition device, and send the search request in advance.
Optionally, the processor is configured to, in the second processing mode, send a request to clear a previous GPS signal at preset time intervals, and simultaneously send a request to search for a current GPS signal until the current GPS signal is searched.
Particularly, the invention also provides a GPS signal loss processing method, which comprises the following steps:
Acquiring road condition information of the vehicle;
Judging whether the vehicle is in a GPS signal easily lost area according to the road condition information, acquiring a first judgment result,
When the first judgment result is yes, selecting a first processing mode to carry out signal recovery processing on the GPS signal;
And if the first judgment result is negative, further judging whether the GPS signal of the vehicle is lost or not, acquiring a second judgment result, and if the second judgment result is positive, selecting a second processing mode to carry out signal recovery processing on the GPS signal.
Alternatively,
The first processing mode includes:
Disconnecting the search request for the GPS signal of the vehicle;
And sending the search request until the vehicle is about to drive out of the area where the GPS signals are easy to lose, and clearing the prior GPS signals.
Optionally, the GPS signal loss processing method further includes the following steps:
And after the second processing mode is selected, sending a request for clearing the prior GPS signals at preset time intervals, and simultaneously sending a request for searching the current GPS signals until the current GPS signals are searched.
According to the scheme of the invention, when the vehicle runs in the area where the GPS signals are easy to lose, the first processing mode is selected for signal recovery processing, and when the vehicle runs in the area where the GPS signals are not easy to lose, if the signals are lost, the signal recovery processing is carried out according to the second processing mode, so that the GPS signals are searched again, and the problem that the GPS signals are lost in the running process of the vehicle is solved.
When a vehicle enters a GPS signal easily-lost area, a GPS search signal is disconnected, a search request is sent in advance when the vehicle is about to exit the GPS signal easily-lost area, and the prior GPS signal is cleared, so that GPS signal loss and signal confusion caused by signal instability can be avoided, continuous signal sending and receiving can be avoided when the signal is unstable, on one hand, the signal communication frequency is saved, on the other hand, the signal storage space is saved, and the storage pressure is reduced. In addition, when the vehicle enters a region where the GPS signal is not easy to lose, the lost GPS signal can be found at a higher speed, so that the user experience is improved. In addition, the system of the invention has simple structure and simple and convenient method flow.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a block schematic diagram of a GPS signal loss processing system according to one embodiment of the present invention;
Fig. 2 is a schematic flow diagram of a GPS signal loss processing method according to one embodiment of the present invention.
Detailed Description
Fig. 1 shows a schematic block diagram of a GPS signal loss processing system according to an embodiment of the present invention. As shown in fig. 1, the GPS signal loss processing system includes a road condition obtaining device 10, a determining module 20 or a processor 30, and the road condition obtaining device 10 is configured to obtain road condition information of a vehicle. The judging module 20 is configured to judge whether the vehicle is in an area where the GPS signal is easily lost according to the road condition information, output a first judgment result, further judge whether the GPS signal of the vehicle is lost when the first judgment result is negative, and output a second judgment result. The processor 30 is configured to select the first processing mode to perform the signal recovery processing on the GPS signal if the first determination result is yes, and select the second processing mode to perform the signal recovery processing on the GPS signal if the second determination result is yes.
The processor 30 is configured to disconnect the search request for the GPS signal of the vehicle after selecting the first processing mode, send the search request until the vehicle is about to exit the area where the GPS signal is easily lost, and clear the previous GPS signal. Therefore, when a vehicle drives into a region where GPS signals are easy to lose, the GPS signals are prevented from losing and being disordered due to unstable signals, and continuous sending and receiving of the signals can be avoided when the signals are unstable, so that the signal communication frequency is saved, the signal storage space is saved, and the storage pressure is reduced.
In one embodiment, when the navigation device of the car navigation or the mobile terminal is in the on state, the road condition obtaining device 10 selects the navigation device of the car navigation or the mobile terminal. The processor 30 is configured to determine the time for exiting the area where the GPS signal is easily lost according to the vehicle speed information of the vehicle and the road condition information acquired by the vehicle-mounted navigation device or the navigation device, and send the search request in advance. The vehicle navigation or navigation device is in signal communication with the determination module 20. When the vehicle-mounted navigation device or the navigation device is started, the navigation map can be acquired, and therefore road condition information of the vehicle can be acquired.
In another embodiment, the road condition obtaining device 10 is selected as an image obtaining device for obtaining an environment image when a navigation device of a vehicle navigation or a mobile terminal of the vehicle is in a closed state. The processor 30 is configured to determine whether to exit the GPS signal loss prone area according to the environment image acquired by the image acquisition device, and send the search request in advance. The image acquisition device may be, for example, a camera mounted on a vehicle, such as an on-board recorder.
The processor 30 is configured to send a request for clearing a previous GPS signal every preset time after selecting the second processing mode, and send a request for searching for a current GPS signal until the current GPS signal is searched.
The working principle of the GPS signal loss processing system is described below:
When the judging module 20 judges that the vehicle is in a region where the GPS signal is easily lost, i.e., a common road condition, and judges that the GPS signal of the vehicle is lost, the vehicle micro-judging module 20MCU sends a removal request for removing a previous GPS signal to the GPS chip for obtaining the GPS signal, and the GPS chip receives the removal request and simultaneously receives a search request for searching for a current GPS signal. After the GPS chip executes the search request, if the MCU receives the GPS signal, the recovery of the GPS signal is judged, if the MCU does not receive the GPS signal within a certain time such as 1min, the non-recovery of the GPS signal is judged, the MCU sends a removal request for removing the prior GPS signal and a search request for searching the current GPS signal to the GPS chip again, and if the GPS signal is not recovered, the above operations are repeated until the GPS signal is recovered.
When the determination module 20 determines that the vehicle is in a region where the GPS signal is easily lost, such as a tunnel road condition, and the vehicle-mounted navigation device or the navigation device of the mobile terminal is not turned on, and when the image acquisition device, such as a vehicle data recorder, determines that the vehicle enters the region where the GPS signal is easily lost through the photographed image, the GPS chip transmits road condition information of the vehicle to the MCU, the MCU stores the GPS signal that has just entered the region where the GPS signal is easily lost, and when the vehicle enters the region where the GPS signal is easily lost, if there is no GPS signal, the MCU analyzes and determines the vehicle as the tunnel road condition according to the previously stored GPS signal, and at this time, signal recovery processing. And when the vehicle is about to exit the tunnel road condition, determining whether the vehicle is about to exit the area where the GPS signal is easy to lose according to the environment image acquired by the image acquisition device, sending the search request in advance, recovering the GPS signal loss processing when the vehicle exits the tunnel road condition, covering the GPS signal when the vehicle just enters the tunnel road condition, and executing the GPS signal recovery processing when the vehicle does not recover within a certain time, such as 20 seconds, after exiting the tunnel road condition.
When the determination module 20 determines that the vehicle is in an area where the GPS signal is easily lost, such as a tunnel road condition, and the vehicle-mounted navigation device or the navigation device of the mobile terminal is turned on, the navigation route information may identify whether the vehicle enters the tunnel road condition, and when the vehicle is determined to be the tunnel road condition, the signal recovery processing is not performed. The MCU calculates the time of the tunnel according to the speed information of the vehicle and the tunnel length information in navigation so as to judge the road condition of the tunnel, after judging that the vehicle has exited the tunnel, the MCU sends the request for searching the GPS signal and clears the GPS signal when the vehicle enters the tunnel road condition, at the moment, the MCU judges that the vehicle is the common road condition, the MCU restores the processing of the GPS signal, if the vehicle exits the tunnel and the GPS signal is restored within a certain time such as 20S, at the moment, the GPS chip and the MCU normally communicate, the MCU does not send an instruction to the GPS chip, if the vehicle judges that the vehicle exits the tunnel and the GPS signal is not restored after the certain time such as 20S, at the moment, the GPS signal restoration processing.
Correspondingly, as shown in fig. 2, the present invention further provides a GPS signal loss processing method, including:
Step S100, acquiring road condition information of a vehicle;
Step S200, judging whether the vehicle is in the area where the GPS signals are easy to lose according to the road condition information, and acquiring a first judgment result,
When the first judgment result is yes, selecting a first processing mode to carry out signal recovery processing on the GPS signal;
When the first judgment result is negative, further judging whether the GPS signal of the vehicle is lost or not, acquiring a second judgment result, and when the second judgment result is positive, selecting a second processing mode to carry out signal recovery processing on the GPS signal;
Optionally, the GPS signal loss processing method further includes:
Step S201, after the first processing mode is selected, disconnecting the search request of the GPS signal of the vehicle;
Step S202, when the vehicle is about to run out of the area where the GPS signals are easy to lose, a search request is sent, and the prior GPS signals are cleared.
Optionally, the GPS signal loss processing method further includes the following steps:
Step S203, after the second processing mode is selected, a request for clearing the prior GPS signals is sent every preset time, and a request for searching the current GPS signals is sent at the same time until the current GPS signals are searched.
According to the scheme of the invention, when the vehicle enters the area where the GPS signal is easy to lose, the GPS signal loss and the signal confusion caused by unstable signals can be avoided, and the continuous sending and receiving of the signal can be avoided when the signal is unstable, so that the signal communication frequency is saved, the signal storage space is saved, and the storage pressure is reduced. In addition, when the vehicle enters a region where the GPS signal is not easy to lose, the lost GPS signal can be found at a higher speed, so that the user experience is improved. In addition, the system of the invention has simple structure and simple and convenient method flow.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (6)
1. A GPS signal loss processing system for a vehicle, comprising:
The road condition acquisition device is used for acquiring road condition information of the vehicle;
The judging module is used for judging whether the vehicle is in a GPS signal loss-prone area according to the road condition information, outputting a first judging result, further judging whether the GPS signal of the vehicle is lost when the first judging result is negative, and outputting a second judging result; and
The processor is used for selecting a first processing mode to perform signal recovery processing on the GPS signal when the first judgment result is yes and selecting a second processing mode to perform signal recovery processing on the GPS signal when the second judgment result is yes;
The processor is configured to disconnect a search request of a GPS signal of the vehicle in the first processing mode until the vehicle is about to exit the area where the GPS signal is easy to lose, send the search request, and clear a previous GPS signal;
The processor is configured to, in the second processing mode, send a request to clear a previous GPS signal every preset time, and at the same time send a request to search for a current GPS signal until the current GPS signal is searched.
2. The GPS signal loss processing system according to claim 1, wherein the road condition acquisition device is selected as a car navigation device or a navigation device of a mobile terminal when the car navigation device or the navigation device of the mobile terminal is in an on state.
3. The GPS signal loss processing system according to claim 2, wherein the processor is configured to determine a time when the vehicle exits the area where GPS signals are prone to be lost according to vehicle speed information of the vehicle and road condition information acquired by the vehicle-mounted navigation device or the navigation device, and to send the search request in advance.
4. The GPS signal loss processing system according to claim 1, wherein the road condition acquisition device is selected as an image acquisition device for acquiring an environment image when a navigation device of a vehicle-mounted navigation device or a mobile terminal of the vehicle is in an off state.
5. The GPS signal loss processing system according to claim 4, wherein the processor is configured to determine whether the GPS signal loss prone area is about to be driven out according to the environment image acquired by the image acquisition device, and to send the search request in advance.
6. A GPS signal loss processing method for a vehicle, characterized by comprising the steps of:
Acquiring road condition information of the vehicle;
Judging whether the vehicle is in a GPS signal easily lost area according to the road condition information, acquiring a first judgment result,
When the first judgment result is yes, selecting a first processing mode to carry out signal recovery processing on the GPS signal;
When the first judgment result is negative, further judging whether the GPS signal of the vehicle is lost or not, acquiring a second judgment result, and when the second judgment result is positive, selecting a second processing mode to carry out signal recovery processing on the GPS signal;
The first processing mode includes:
Disconnecting the search request of the GPS signal of the vehicle until the vehicle is about to drive out of the area where the GPS signal is easy to lose, then sending the search request, and clearing the prior GPS signal;
Also comprises the following steps:
And after the second processing mode is selected, sending a request for clearing the prior GPS signals at preset time intervals, and simultaneously sending a request for searching the current GPS signals until the current GPS signals are searched.
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| JPH073463B2 (en) * | 1989-11-22 | 1995-01-18 | パイオニア株式会社 | Satellite radio wave capturing method of GPS receiver |
| JP4376330B2 (en) * | 1998-08-10 | 2009-12-02 | 富士通テン株式会社 | Satellite tracking antenna device for moving objects |
| US7603233B2 (en) * | 2006-10-16 | 2009-10-13 | Alpine Electronics, Inc. | Map matching method and apparatus for navigation system |
| US8725327B2 (en) * | 2008-04-22 | 2014-05-13 | Exelis Inc. | Navigation system and method of obtaining accurate navigational information in signal challenging environments |
| CN101782398A (en) * | 2009-01-21 | 2010-07-21 | 佛山市顺德区顺达电脑厂有限公司 | Map information updating device and method |
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| JP5565146B2 (en) * | 2010-06-30 | 2014-08-06 | 株式会社Ｊｖｃケンウッド | Position detection apparatus and position detection method |
| CN103728633B (en) * | 2014-01-22 | 2015-08-12 | 宇龙计算机通信科技(深圳)有限公司 | A kind of method and device avoiding location loss |
| CN105929409A (en) * | 2016-04-12 | 2016-09-07 | 努比亚技术有限公司 | Navigation signal control system and method |
| CN106097754B (en) * | 2016-06-27 | 2019-03-22 | 安徽超远信息技术有限公司 | A kind of mobile law enforcement position acquisition and bearing calibration based on wireless communication and satellite model |
| CN106123906A (en) * | 2016-08-17 | 2016-11-16 | 深圳市金立通信设备有限公司 | A kind of auxiliary navigation method and terminal |
| CN107071141A (en) * | 2017-01-05 | 2017-08-18 | 深圳市金立通信设备有限公司 | A kind of function control method and terminal |
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